panic log / crash analysis help

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iPhone SE 2020

2020年4月宣布和发布的第二代iPhone SE的维修和拆卸信息。

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B C @beekerc

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发帖于: 2023年2月22日

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panic log / crash analysis help

not a newb, but all my experience is with hardware component swaps. trying to figure out a reboot issue and don't know anything about crash analysis.

i can see in 3uTools that the crash code is Panic CPU x caller

Crash reason is Problem connecting CPU to peripherals

here's a snippet from the latest log. not sure if there's a way to attach a full log here (if there is please let me know).

so i guess my first question is - what should i be looking for?

what information is useful here to help me figure out what's going on?

{"bug_type":"210","timestamp":"2023-02-22 16:23:51.00 +0900","os_version":"iPhone OS 16.3 (20D47)","roots_installed":0,"incident_id":"642F6961-D4DE-4B04-9637-CA8BB283AE6C"}

{

"build" : "iPhone OS 16.3 (20D47)",

"product" : "iPhone10,4",

"socId" : "0x00008015",

"kernel" : "Darwin Kernel Version 22.3.0: Wed Jan 4 21:24:35 PST 2023; root:xnu-8792.82.2~1\/RELEASE_ARM64_T8015",

"incident" : "642F6961-D4DE-4B04-9637-CA8BB283AE6C",

"crashReporterKey" : "d13e48559dbf2fac784c8b7a66d04be2ab772b62",

"date" : "2023-02-22 16:23:51.31 +0900",

"panicString" : "panic(cpu 2 caller 0xfffffff00ed2e158): "i2c2::_checkBusStatus SCL is stuck low; last write status 00010108 int shadow 00010100 xfer 00000000 fifo 00000000 for device audio-speaker-top"

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Jerry Wheeler @dadibrokeit

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Hi B C,

Okay, Apple is big on using the I2C bus for communicating with peripherals in the iPhone. I2C has two lines, the data line (SDA) and the clock line (SCL). The phone you're working on is complaining that the clock line is stuck low; when it releases the clock, it's not seeing the signal go high as it should.

So yeah, you're definitely looking at a hardware failure here, and the clue as to where is in the very last bit of the log you posted, "device audio-speaker-top". Perhaps Alisha (@flannelist) can verify, but it sounds to me like a problem with the earpiece speaker flex, AKA the "Front Camera And Sensor Cable" as it's termed in the corresponding repair guide. I'd probably start by checking that flex cable and replacing it.

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i'll give that a shot. i think i've got a spare front cam flex lying around.

由 B C 完成的 2023年3月3日

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i'll give that a shot. i think i've got a spare front cam flex lying around. — B C

iPhone SE 2020

panic log / crash analysis help

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